FieldInstanceOptionTranslation.php in Drupal 9        
                          
                  
                        
  
  
  
  
File
  core/modules/field/src/Plugin/migrate/process/d6/FieldInstanceOptionTranslation.php
  
    View source  
  <?php
namespace Drupal\field\Plugin\migrate\process\d6;
use Drupal\migrate\MigrateExecutableInterface;
use Drupal\migrate\ProcessPluginBase;
use Drupal\migrate\Row;
class FieldInstanceOptionTranslation extends ProcessPluginBase {
  
  public function transform($value, MigrateExecutableInterface $migrate_executable, Row $row, $destination_property) {
    list($field_type, $global_settings) = $value;
    $option_key = 0;
    $translation = '';
    if (isset($global_settings['allowed_values'])) {
      $list = explode("\n", $global_settings['allowed_values']);
      $list = array_map('trim', $list);
      $list = array_filter($list, 'strlen');
      switch ($field_type) {
        case 'boolean':
          $option = preg_replace('/^option_/', '', $row
            ->getSourceProperty('property'));
          for ($i = 0; $i < 2; $i++) {
            $value = $list[$i];
            $tmp = explode("|", $value);
            $original_option_key = isset($tmp[0]) ? $tmp[0] : NULL;
            $option_key = $i === 0 ? 'off_label' : 'on_label';
            
            if ($option == $original_option_key) {
              $translation = $row
                ->getSourceProperty('translation');
              break;
            }
          }
          break;
        default:
      }
    }
    return [
      'settings.' . $option_key,
      $translation,
    ];
  }
}